package com.weclud.utils;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

/**
 * 下载工具
 */
public class UploadTools {

    /**
     * 通过网络地址获取文件InputStream
     *
     * @param path 地址
     * @return
     */
    public static InputStream returnBitMap(String path) {
        URL url = null;
        InputStream is = null;
        try {
            url = new URL(path);
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        try {
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();//利用HttpURLConnection对象,我们可以从网络中获取网页数据.
            conn.setDoInput(true);
            conn.connect();
            is = conn.getInputStream();    //得到网络返回的输入流

        } catch (IOException e) {
            e.printStackTrace();
        }
        return is;
    }


    /**
     * 通过网络url取文件，并保存
     *
     * @param path 文件保存路径
     * @param url  网络地址
     */
    public void uploadImage(String path, String url) {
        try {
            URL pathUrl = new URL(url);
            DataInputStream dataInputStream = new DataInputStream(pathUrl.openStream());
            File file = new File(path);
            FileOutputStream fileOutputStream = new FileOutputStream(file);
            byte[] buffer = new byte[1024];
            while (dataInputStream.read(buffer) > 0) {
                fileOutputStream.write(buffer);//将buffer中的字节写入文件中区
            }
            dataInputStream.close();//关闭输入流
            fileOutputStream.close();//关闭输出流

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

